Time gone is time lost !

अधः पश्यसि किं वृद्धे पतितं तं किं भुवि |
रे रे मूर्ख न जानासि गतं तारुण्यमौक्तिकम्  | | – चाणक्य नीति
Adhah pashyasi ki vruddhe patitam tam kim bhuwi
Re re murkh na jaanasi gatam taarunymauktikam – Chanakya niti
Meaning: A youth sarcastically asked an extremely old and bent over woman, “What are you searching, have you dropped something, or have you lost something?” The old lady said, “Fool, can’t you see that I am looking for the time of my youth that has gone by.”